package main.java.middle;

import java.util.HashMap;

/**
 * @Author: 郑国荣
 * @Date: 2023-08-18-13:01
 * @Description:
 */
public class Test {
    @org.junit.jupiter.api.Test
    public void getMap(){
        HashMap<Object, Object> map = new HashMap<>();
        map.put("a",1);
        map.put("a",2);
        map.put(1,"a");
        map.put(2,"a");
        System.out.println(map.get("a"));

    }
}
